JP2002081507A - V-grooved pulley belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a V-grooved pulley belt capable of suppressing a sliding noise and vibration noise for a long period. SOLUTION: In this V-grooved pulley belt, at least one V-rib 4 extending in circumferential direction is formed on one face or both faces of the belt, and short fibers 5 are buried in the V-rib. The short fibers 5 projected from the side faces of the V-rib 4 among the short fibers 5 buried in the V-rib 4 are tilted to the rear side of the belt in belt running direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a V-belt and a V-ribbed belt (a pulley belt with a V-groove) used in automobiles and general industrial machines.

[0002]

2. Description of the Related Art In recent years, V-belts and V-ribbed belts are generally provided with short fibers on the back surface of the V-rib portion in order to improve noise resistance, abrasion resistance, deformation resistance and durability of the V-rib portion. It is buried in a manner that it is parallel and perpendicular to the longitudinal direction of the belt, and a part of the buried short fiber is projected from the side surface of the V-rib.

Therefore, when the V-belt or the V-ribbed belt is mounted on a pulley with a V-groove, the short fiber protruding portion on the belt side comes into pressure contact with the side wall surface of the V-groove of the pulley. Vibration noise is suppressed.

However, since the direction of the short fibers protruding from the side surface of the V-rib is parallel to the back surface of the belt and perpendicular to the longitudinal direction of the belt, the protruding portion of the short fiber is pressed against the side wall surface of the V-groove of the pulley. Then, the short fiber projecting portion is bent at a large angle in a shape along the side surface of the belt V rib, and the short fiber is cut from the bent portion by running the belt for a relatively short time. That is, the V-belt or the V-ribbed belt cannot suppress the slipping sound and the vibration sound for a long time.

[0005] Therefore, in the industry using this type of belt, there is a long-awaited desire to develop a pulley belt with a V-groove, such as a V-belt or a V-ribbed belt, which can suppress slipping noise and vibration noise for a long period of time.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pulley belt with a V-groove which can suppress slipping noise and vibration noise for a long period of time.

[0007]

Means for Solving the Problems (Invention of Claim 1)
A belt for a pulley with a V-groove according to the present invention is formed by forming at least one V-rib extending in the circumferential direction on one or both sides of the belt, and a pulley with a V-groove having short fibers embedded in the V-rib. In the belt, among the short fibers embedded in the V-rib, short fibers protruding from the side surface of the V-rib are inclined backward in the belt running direction. (The invention according to claim 2) The belt for a pulley with a V-groove according to the present invention relates to the invention according to the above-mentioned claim 1, wherein the short fibers protruding from the side surface of the V-rib are parallel to the belt rear surface and rearward in the belt running direction. It has what is inclined. (3) The pulley belt with a V-groove according to the present invention relates to the invention according to the above-mentioned (1) or (2), wherein the short fiber group inclined rearward in the belt running direction is formed in the height direction of the V-rib. Are arranged at regular intervals. According to a fourth aspect of the present invention, there is provided a pulley belt with a V-groove according to any one of the first to third aspects, wherein the short fibers protruding from the side surface of the V-rib are arranged in the belt running direction. On the other hand, the one inclined rearward and the one inclined forward are alternately arranged in the height direction of the V-rib. According to a fifth aspect of the present invention, there is provided a pulley belt with a V-groove according to any one of the first to fourth aspects, wherein short fibers having a high rigidity and a low rigidity are mixed. Matching. (The invention according to claim 6) The pulley belt with a V-groove according to the present invention relates to the invention according to any one of claims 1 to 5, wherein the angle between the short fiber and the side surface of the V-rib is 5 ° to 60 °. °
Is set to

[0008] The pulley belt with a V-groove of the above invention will be clarified in the following embodiments of the invention.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings showing embodiments. (Embodiment 1) FIG. 1 is a sectional view of a V-ribbed belt B according to an embodiment of the present invention, and FIG. 2 is a view taken along the line XX of FIG.

As shown in FIG. 1, the V-ribbed belt B includes a canvas 1, an adhesive rubber layer 2, a core wire 3 embedded in the adhesive rubber layer 2, and four rubber plates 4A, 4B, 4A, 4
And three V ribs 4 made of B.

The canvas 1 is formed by weaving a nylon thread, and forms the back surface of the V-ribbed belt B. In addition, as a material of the canvas 1, cotton, polyester, or the like can be adopted.

The adhesive rubber layer 2 is made of chloroprene rubber and serves to integrate the canvas 1 and the V-rib 4 as shown in FIG. In addition, as a material of the adhesive rubber layer 2, EPDM, H-NBR, ACSM or the like can be adopted.

The core 3 is made of a polyester resin. In addition, aramid or the like can be adopted as the core wire 3.

The rubber plates 4A and 4B constituting the V rib 4 are
The short fibers 5 are mixed into the heated and softened chloroprene rubber, and the mixture is discharged from the thin plate forming outlet of the extruder. In addition, as a material of the V rib layer 4, EPDM, H-NBR, ACSM or the like can be adopted.

As shown in FIGS. 1 and 2, on the rubber plate 4A, short fibers 5 projecting from the side surfaces of the V-ribs 4 are inclined in parallel to the belt rear surface and rearward in the belt running direction. On the rubber plate 4B, short fibers 5 protruding from the side surface of the V-rib 4 are inclined parallel to the belt rear surface and forward in the belt running direction, as shown in FIG. As the short fibers 5, those having high rigidity such as aramid fibers are used.

When the V-ribbed belt B is stretched on a pair of V-groove pulleys and driven to rotate, the short fibers protruding from the rubber plates 4A, 4B, 4A, 4B are pressed against the side walls of the V-grooves of the pulley. In addition, slip noise and vibration noise during belt running are suppressed.

Here, in this V-ribbed belt B, the short fibers 5 protruding from the rubber plate 4B have the protruding direction set as described above. It is cut off in a relatively short time as shown. However, in the V-ribbed belt B, the short fibers 5 projecting from the rubber plate 4A are inclined forward in the belt running direction as described above, so that the short fibers 5 are pressed against the side wall surface of the V groove of the pulley. The short fiber protruding portion 5 is bent at a small angle into a shape along the side surface of the belt V rib, and is not cut for a long time.

Therefore, when this V-ribbed belt B is used, slip noise and vibration noise can be suppressed for a long period of time.

Hereinafter, the method of manufacturing the V-ribbed belt B will be described in accordance with the following. Treatment of the back cloth 1 according to the application (for example, adhesion of rubber paste)
Is performed, and the resultant is bias-cut and wound around a mold K having a cylindrical diameter as shown in FIG. An adhesive rubber plate to be an adhesive rubber layer 2 is wound on the back cloth 1 wound around the mold K as shown in FIG. In addition,
FIG. 7 shows a state in which the core wire 3 is wound with tension, and in this state, the adhesive rubber layer 2 has wound the core wire 3. The rubber plates 4A, 4B, 4A, 4B connected in a belt shape constituting the V rib 4 are wound on the adhesive rubber layer 2.

Here, when forming the rubber plates 4A and 4B, first, as shown in FIG. 4, a rubber plate 4 'in which the short fibers 5 are oriented in the longitudinal direction is formed, and this rubber plate 4' is fixed to a predetermined shape. It is assumed that the short fibers 5 have a predetermined angle with respect to the longitudinal direction as shown in FIGS. 5 and 6 by cutting at an angle and joining non-cut sections.

The length of the rubber plates 4A, 4B, 4A, 4B is such that the first round of the rubber plate 4A, the second week of the rubber plate 4B, and the third round of the rubber plate 4A are on the adhesive rubber layer 2. However, in the fourth week, the setting is made so that the rubber plate 4B is wound. A mold K on which a back cloth 1, an adhesive rubber layer 2, a core wire 3, and rubber plates 4A, 4B, 4A, 4B are wound is put in a vulcanizing can, and is heated and pressed to be vulcanized. The belt slab together with the mold K is taken out of the vulcanizing can, and after cooling, the belt slab is released. When the belt slab is trimmed in width and the V-ribs 4 are formed using a polishing machine, a V-ribbed belt B in which the short fibers 5 project from the side surfaces of the V-ribs 4 in the above-described manner is completed. (Embodiment 2) As shown in FIG. 8, the V-ribbed belt B of this embodiment has rubber plates 4A, 4
In B, chloroprene rubber heated and softened is mixed with short fibers 5 (eg, aramid fibers) and short fibers 5a (eg, cotton) having low rigidity, and the mixture is discharged from a discharge port for forming a thin plate. It is formed so as to be ejected.
The short fibers 5 protruding from the side surface of the protruding V-rib 4
The direction of 5a is the same as in the first embodiment.

In the V-ribbed belt B, the short fibers 5 projecting from the rubber plate 4B are projected as described above, so that the short fibers 5 are pressed against the side walls of the V-groove of the pulley, as shown in FIG. It is cut in a relatively short time,
a is not cut for a long time. For the rubber plate A, neither the short fibers 5 nor 5a are cut for a long time.

Therefore, when this V-ribbed belt B is used, slip noise and vibration noise can be suppressed for a very long time.

Although the present invention relates to the V-ribbed belt B of the first and second embodiments, the present invention can be applied to a V-belt.

In the above embodiment, the short fiber and the V
The angle between the rib and the side surface is preferably set to 5 ° to 60 °.

[0026]

The present invention has the following effects since it has the above-described configuration.

As is clear from the description of the embodiments of the present invention, a pulley belt with a V-groove capable of suppressing the sliding noise and the vibration noise for a long period of time was provided.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a pulley belt with a V-groove according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing the direction of short fibers protruding from a side surface of a V-rib of the pulley belt with a V-groove.

3 is an explanatory diagram showing a state of short fibers protruding from a side surface of a V-rib of a pulley belt with a V-groove when used for a certain period from the state of FIG. 2;

FIG. 4 is an explanatory view of a rubber plate forming the V-rib.

FIG. 5 is an explanatory view of a rubber plate used for manufacturing the pulley belt with a V-groove according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of a rubber plate used for manufacturing the pulley belt with a V-groove.

FIG. 7 is an explanatory diagram showing a state in which a back cloth, an adhesive rubber layer, a core wire, and a rubber plate are wound around a mold at the time of manufacturing the pulley belt with a V-groove.

FIG. 8 is an explanatory view of a short fiber projecting from a side surface of a V-rib of a pulley belt with a V-groove according to a second embodiment of the present invention.

FIG. 9 is an explanatory view showing a state of short fibers protruding from a side surface of a V-rib of a pulley belt with a V-groove when used for a certain period from the state of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back cloth 2 Adhesive rubber 3 Core wire 4 V-rib 4A Rubber plate 4B Rubber plate 5 Short fiber 5a Short fiber

Claims (6)

[Claims] 1. A belt for a pulley with a V-groove, wherein at least one V-rib extending in the circumferential direction is formed on one or both sides of the belt, and a short fiber is embedded in the V-rib. A pulley belt with V-grooves, wherein, among the short fibers embedded in the belt, short fibers protruding from the side surface of the V-rib are inclined rearward in the belt running direction. 2. The V fiber according to claim 1, wherein the short fibers protruding from the side surface of the V-rib are parallel to the back surface of the belt and inclined toward the rear side in the belt running direction.
Belt for grooved pulley. 3. The pulley with V-groove according to claim 1, wherein the short fiber groups inclined rearward in the belt running direction are arranged at regular intervals in the height direction of the V-rib. Belt. 4. The group of short fibers protruding from the side surface of the V-rib,
4. The method according to claim 1, wherein the one inclined in the rearward direction and the one inclined in the forward direction with respect to the belt running direction are alternately arranged in the height direction of the V-rib. The pulley belt with a V-groove according to the above. 5. The pulley belt with a V-groove according to claim 1, wherein the short fibers have a high rigidity and a low rigidity are mixed. 6. The angle between the short fiber and the side surface of the V-rib is 5 °.
The pulley belt with a V-groove according to any one of claims 1 to 5, wherein the angle is set to 60 °.